What is CVE-2023-28015?

CVE-2023-28015 is a medium-severity vulnerability in Hcl Domino Appdev Pack, classified under Observable Discrepancy. CVSS score: 5.3/10. Published 2023-05-23.

How severe is CVE-2023-28015?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Hcl Domino Appdev Pack

CVE-2023-28015

The HCL Domino AppDev Pack IAM service is susceptible to a User Account Enumeration vulnerability. During a failed login attempt a difference in messages could allow an attacker to determine if the user is valid or not. The attacker could use this information to focus a brute force attack on valid users.

Published 2023-05-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.004 (36.6th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 36.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Hcl Domino Appdev Pack
Hcl Software Domino Appdev Pack — versions < 1.0.6

Weakness classification (CWE)

CWE-203 — Observable Discrepancy

References

support.hcltechsw.com/csm (Vendor Advisory)

Frequently asked questions

What is CVE-2023-28015?: CVE-2023-28015 is a medium-severity vulnerability in Hcl Domino Appdev Pack, classified under Observable Discrepancy. CVSS score: 5.3/10. Published 2023-05-23.
How severe is CVE-2023-28015?: Medium severity. CVSS v3 base score is 5.3 out of 10.